From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qc0-f180.google.com (mail-qc0-f180.google.com [209.85.216.180]) by kanga.kvack.org (Postfix) with ESMTP id 0D72D6B0038 for ; Mon, 16 Mar 2015 16:26:28 -0400 (EDT) Received: by qcto4 with SMTP id o4so55257752qct.3 for ; Mon, 16 Mar 2015 13:26:27 -0700 (PDT) Received: from mx1.redhat.com (mx1.redhat.com. [209.132.183.28]) by mx.google.com with ESMTPS id 84si10922931qhx.130.2015.03.16.13.26.26 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 16 Mar 2015 13:26:27 -0700 (PDT) Date: Mon, 16 Mar 2015 20:44:46 +0100 From: Oleg Nesterov Subject: Re: install_special_mapping && vm_pgoff (Was: vvar, gup && coredump) Message-ID: <20150316194446.GA21791@redhat.com> References: <20150305154827.GA9441@host1.jankratochvil.net> <87zj7r5fpz.fsf@redhat.com> <20150305205744.GA13165@host1.jankratochvil.net> <20150311200052.GA22654@redhat.com> <20150312143438.GA4338@redhat.com> <20150312165423.GA10073@redhat.com> <20150312174653.GA13086@redhat.com> <20150316190154.GA18472@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: owner-linux-mm@kvack.org List-ID: To: Andy Lutomirski Cc: Hugh Dickins , Linus Torvalds , Jan Kratochvil , Sergio Durigan Junior , GDB Patches , Pedro Alves , "linux-kernel@vger.kernel.org" , "linux-mm@kvack.org" On 03/16, Andy Lutomirski wrote: > > Ick, you're probably right. For what it's worth, the vdso *seems* to > be okay (on 64-bit only, and only if you don't poke at it too hard) if > you mremap it in one piece. CRIU does that. I need to run away till tomorrow, but looking at this code even if "one piece" case doesn't look right if it was cow'ed. I'll verify tomorrow. Oleg. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org